Ali Guzel

Mr. Ali Guzel

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17 years, 364 days

MaplePrimes Activity


These are questions asked by Ali Guzel

Hi All,

Maple is changing fast. It is not possible to run some older codes. 

Is it possible those who have a valid Maple license to have the old versions free of charge?

I have Maple 7, 2018, 2021 licenses but still have problem running older codes.

DirectSearch finds nonexisting roots....     DirectSearch_finds_nonexisting_roots.mw

 

restart

plot([cos(x), 0.001*x*x],x=-40..40,y=0..2)     ### test function plot

 

eq:= cos(x)= 0.001*x*x;     ###   float

cos(x) = 0.1e-2*x^2

(1)

use RealDomain in solve(eq,x,explicit) end use   ## lacking some of the roots

-7.793210110, 7.793210110, -11.11953559, 11.11953559, -4.734809278, 4.734809278, -1.568336644, 1.568336644

(2)

use RealDomain in solve(eq,x) end use

-7.793210110, 7.793210110, -11.11953559, 11.11953559, -4.734809278, 4.734809278, -1.568336644, 1.568336644

(3)

fsolve(eq,x=-30)

-31.17938383

(4)

plot([cos(x), 0.001*x*x],x=-32..-31,y=0.9..1)

 

fsolve(eq,x=-32..-30);  fsolve(eq,x=-31.7..-31.4)

-31.17938383

 

-31.52634294

(5)

with(DirectSearch)

[BoundedObjective, CompromiseProgramming, DataFit, ExponentialWeightedSum, GlobalOptima, GlobalSearch, Minimax, ModifiedTchebycheff, Search, SolveEquations, WeightedProduct, WeightedSum]

(6)

eq;
SolveEquations(eq,AllSolutions):

cos(x) = 0.1e-2*x^2

(7)

interface(rtablesize=90);
SolveEquations(eq, AllSolutions)

90

 

Matrix(%id = 4800942722)

(8)

DirectSearch finds nonexisting roots!!!

Dr. Ali GÜZEL

 

Download DirectSearch_finds_nonexisting_roots.mw

restart; p := .5; n := 10; nseq := 2; with(Statistics); randomize(); x1 := seq(Sample(RandomVariable(BernoulliDistribution(p)), n), i = 1 .. nseq); x2 := seq(convert(x1[i], list), i = 1 .. nseq)

[HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0)], [HFloat(0.0), HFloat(1.0), HFloat(1.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0)]

(1)

x2[1]

[HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0), HFloat(0.0), HFloat(0.0), HFloat(0.0), HFloat(1.0)]

(2)

whattype(x2[1])

list

(3)

numboccur(x2[1], {0.})

0

(4)

NULL

But, when I plugged the list at (2) it works...  

numboccur([0., 0., 1., 1., 0., 0., 1., 0., 0., 0.], 0.)

7

(5)

``

NULL

NULL

Download numboccur.mwnumboccur.mw

Hello Guys and Girls,

I have a problem with animate command with background option..

I attached my maple worksheet for your review.

Could you help me out?  Thanks.

I love Maple,

Sincerely

Ali Guzel

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